Green Chemistry

Pentaalkylmethylguanidinium methylcarbonates–versatile precursors for the preparation of halide-free and metal-free guanidinium-based ILs

B Oelkers, J Sundermeyer

Index: Oelkers, Benjamin; Sundermeyer, Joerg Green Chemistry, 2011 , vol. 13, # 3 p. 608 - 618

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Citation Number: 20

Abstract

Pentaalkylmethylguanidinium methylcarbonates 6 can easily be prepared from pentaalkylguanidines 5 and dimethyl carbonate (DMC) in a sustainable solvent-free synthesis. Most of the title compounds are room temperature ionic liquids (RTILs) which provide convenient access to halide-free guanidinium-based ILs (GILs) 7via acid–base reactions and subsequent decarboxylation, similar to industrially important imidazolium ...